Anyone know what can REALLY clean dirty Eisen Glass?

Lemon pledge and a soft rag..... works like a charm.

I use that NON Stop and it still got crappy towards the end of last year. I was looking for something that will really take off all the scum and crap

Ttt

Pledge, also prevents fogging.

http://yachtbrite.com/surface.aspx?ID=32

A good detailer in this area has had great results just using car wax. I saw it before and after survey and couldn't believe it. Worth a try.

Plexus.
Used on aircraft canopies, motorcycle helmets, rear windows of ragtops, and just about anything else made of plastic, including my glasses.

2000 Or 2500 Wet Sand, Meguires Has A Cleaner And Wax For Isenglass

I use the Novus plastic polishes & cleaners on everything clear that isn't glass. Seems to work pretty well.
I also tried the Meguiar's stuff on the back window of my Porsche cabrio at one time...I think it made the scratches worse.